From patchwork Mon Apr 27 18:23:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergei Miroshnichenko X-Patchwork-Id: 11513137 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 56886913 for ; Mon, 27 Apr 2020 18:24:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 391B8214D8 for ; Mon, 27 Apr 2020 18:24:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=yadro.com header.i=@yadro.com header.b="lOu3l3GU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726384AbgD0SY2 (ORCPT ); Mon, 27 Apr 2020 14:24:28 -0400 Received: from mta-02.yadro.com ([89.207.88.252]:52950 "EHLO mta-01.yadro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726531AbgD0SY1 (ORCPT ); Mon, 27 Apr 2020 14:24:27 -0400 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id CD45C4C868; Mon, 27 Apr 2020 18:24:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received; s=mta-01; t= 1588011863; x=1589826264; bh=NhyeZ7qareUCWx/o8bZx+KH2BFwgbLtHLeO fW2hgn6Y=; b=lOu3l3GUK1IU17BOOHwHHZWR0mDS7pNKqwU0RqTAJFQypPZ1rNi NX73RKPmp488smoZ+JKLLpR4a2vOewhJiEGLHZR8wZGd+xNA+yASbhXkGlGEKFsE 6DnqoApuTpZQzdz8NEwWCHKflpD14DiNph+bLg9sGolwUESbXLIXae3I= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3WGYdp5sJSoT; Mon, 27 Apr 2020 21:24:23 +0300 (MSK) Received: from T-EXCH-02.corp.yadro.com (t-exch-02.corp.yadro.com [172.17.10.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id DAE844C84B; Mon, 27 Apr 2020 21:24:12 +0300 (MSK) Received: from NB-148.yadro.com (172.17.15.136) by T-EXCH-02.corp.yadro.com (172.17.10.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Mon, 27 Apr 2020 21:24:13 +0300 From: Sergei Miroshnichenko To: CC: Bjorn Helgaas , Lukas Wunner , Stefan Roese , Andy Lavr , =?utf-8?q?Chris?= =?utf-8?q?tian_K=C3=B6nig?= , Ard Biesheuvel , David Laight , Rajat Jain , , Sergei Miroshnichenko Subject: [PATCH v8 19/24] PCI: pciehp: Trigger a domain rescan on hp events when enabled movable BARs Date: Mon, 27 Apr 2020 21:23:53 +0300 Message-ID: <20200427182358.2067702-20-s.miroshnichenko@yadro.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200427182358.2067702-1-s.miroshnichenko@yadro.com> References: <20200427182358.2067702-1-s.miroshnichenko@yadro.com> MIME-Version: 1.0 X-Originating-IP: [172.17.15.136] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-02.corp.yadro.com (172.17.10.102) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org With movable BARs, hot-adding a device is not local to its bridge anymore, but it affects the whole RC: BARs and bridge windows can be substantially rearranged. So instead of trying to fit the new devices into preallocated reserved gaps, initiate a full domain rescan. The pci_rescan_bus() covers all the operations of the replaced functions: - assigning new bus numbers, as the pci_hp_add_bridge() does it; - allocating BARs (pci_assign_unassigned_bridge_resources()); - cofiguring MPS settings (pcie_bus_configure_settings()); - binding devices to their drivers (pci_bus_add_devices()). Signed-off-by: Sergei Miroshnichenko --- drivers/pci/hotplug/pciehp_pci.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/pci/hotplug/pciehp_pci.c b/drivers/pci/hotplug/pciehp_pci.c index d17f3bf36f70..6d4c1ef38210 100644 --- a/drivers/pci/hotplug/pciehp_pci.c +++ b/drivers/pci/hotplug/pciehp_pci.c @@ -58,6 +58,11 @@ int pciehp_configure_device(struct controller *ctrl) goto out; } + if (pci_can_move_bars) { + pci_rescan_bus(parent); + goto out; + } + for_each_pci_bridge(dev, parent) pci_hp_add_bridge(dev);